Ventilator



Aug. 31, 1954 H. KNUTSON EI'AL VENTILATOR 3 Sheets-Sheet 1 Filed Oct. 12, 1950 INVENTORS. HAROLD KNUTSON HAROLD G. KNUTSON Aug. 31, 1954 H. KNUTSON l-rrAL 2,687,685 VENTILATOR Filed Oct. 12, 1950 3 Sheets-Sheet 2 Patented Aug. 31, 1954 UNITED STATES PATENT .oF-FmE V EN TILATOR Harold Knutsonand: Harold G- Knutson, Chicago, .:Ill.

Application October 12, 1950, SerialNo. 189322 6 Claims. (Cl.n.98-'-42) V 'lzhisinvention relates in and isimore particularly described to aprovide for substantially continuous ventilation.

i In: ventilators portant to connect them together of. the dual ridge type, it isimso that they the ventilators from-the top thereof and deflecting the normal outlet flow through the ventilators.

ride. av maximum. outlet. height. i i l Aistill furtherobject, of. the: invention is. to provide new and improved means. for mounting, counter-balancing and operating the dampers in the aventilators.

Other objects of "the inventionwill .appear in thaspecification and will be apparent. from the accompanying drawingspin which,

g-Fig. 1;; is a perspectiveview of a ventilator unit.

ings, amounting bas'e l o means for operating and counter-balancing "the damper; and

"Fig.- 6-is a=-view-'similarto-Fig; 5showing a motor operating means for the damper.

In applyingdual ridge ventilators to abuilding, it is customary-to provide aroofopening-of desirable length with a curborprojection around the opening and to mount the-ventilator in connection' with the curb andoverlapping it.

.Referring now. more. particularly to thedrawof sheet metalis shown turned sides 12 and tilator ands-these. sides and endsware conveniently and: solidlyiattached. to the.,curb or other roof structure.

w-Ifxthe unit is:- to i be. connected. to similar ypara1181. llnitS,MOI1e. side I 2a: is. turned. upwardly :1 as shown in Fig. 2;;and1- theother a simiiar. side. 1| Zmof,

unitgaremonnected-in end. to. Lend relationas 45" shown in Fig.3; one .endd-ia is. turned upwardly and ftheiothen; end ;.l'4b..is..turned. upwardly and bent downwardly; to overlap-tan endxzMa of an ad.- jacent -u-nit.

person may walk, if desired.

-In constructing the ventilator; adjacent singleunitsas shown in Fig; 4are similarly formed into a twin unit and preferably have a common central member l6 inclined upwardly at both sides and the upper edges 18 turned upwardly and bent over downwardly to provide an inner seat for a damper. At the inside of the base Ill is an opening 20, and the central member It may be made from the material of the opening or formed separately therefrom and secured to the ends 22 in any well known manner.

At each outer side of the opening is a deflector 24 which extends angularly upward and has a vertical edge 26 which is turned downwardly and outwardly opposite the edge is of the central member M to provide the other opposite seat for a damper adapted to rest thereon. An outer side member 28 is connected between the end 22 at each side of the unit and has an upper inwardly inclined top 30, the inner edge of the top having an outward bead 32 and the lower edge of the side having an inward bead 34 for strengthening purposes. The lower edge of the bead 33 is terminated at a distance above the base in to form a draining outlet from the interior of the ventilator.

At the inside of each pair of ventilators is a common wall member 36 conforming to the vertical portion of the outer wall members 28 with an inwardly inclined trough 38 at the top and also an inverted trough 40 at the bottom. The upper edges of the top trough member 38* are turned over inwardly to form an outward protecting and strengthening bead 32 similar to those of the outer members 28. The inverted trough member to at the bottom is located within the common central member it and terminates short of engagement therewith to provide drain openings d2 between it and the member Hi. This inner member comprising the common wall 36 and the trough portions 38 and 40 are secured together and to the ends 22 by flanges in a well known manner.

Extending transversely of each unit and at intervals therein are strengthening webs 44 connected to the upper side of the lower inclined members 24 and to the upright inner side of the outer side member 28. Between the inner members 36 and the central member [Bare similar strengthening webs d6 which are attached to the upper projecting sides of thecentral member Hi, to the upper surfaces of the inverted trough 40, and to the opposite sides of the common wall 36.

A central angular deflector the ends of eachventilator and extends longitudinally thereof with its apex slightly above the upper edges of the sides and with lower flaring sides 52 which are substantially parallel with the inclined portions 30 and 38 of the outer and inner sides respectively and also with the inclined lower deflectors It and 24 at the inner and outer sides respectively of each ventilator. The outer edges of the sides 52 project outwardly beyond the inner upright seat portions i8 and 2B of the bottom deflectors so that liquid dripping from the outer edges of the deflector 50 will fall upon the upper surface of the central deflector It and of the outward deflector 2 and liquid therefrom will drain outwardly through the central member and at the bottom of the inclined deflector 24 to one end outside of the base It.

This deflector 5E5 is secured to the ends 22 of the ventilator and each end covers the apex of the deflector; intermediate its ends are down draft diverters 5 arranged in pairs and the members of each pair inclined toward each other as shown in Figs. 1 and 3. Any air passing over the top of the ventilators and having a tendency to pass downwardly into the ventilator will be deflected upwardly by the inclined sides of these diverters to prevent any substantial flow of air or gas inwardly through the ventilator. These diverters are secured to the outer walls of the deflector 5G and to the inner walls of the inner and outer sides 36 and 28 principally at their inclined portions 38 and 30 respectively, thereby materially strengthening the sides and the inclined portion thereof and firmly holding the deflector St in place.

A damper 5i: is also formed of sheet material and preferably has a central portion inclined downwardly at the sides with side flanges 58 bent downwardly at the edges to overlap the seat edges 18 and 26 of the corresponding bottom deflectors. This damper commonly rests in position on top of the vertical sides which form the damper seats and is movably mounted thereon by links Gil near one end,'each mounted at its lower end upon a bearing pin 62 supported by the vertical side 26 (or IE) which forms the damper seat, and connected by a bearing pin Ed at its upper end engaging in a bracket es secured to the under side of the damper.

At the other end of the damper is a supporting member Bl somewhat S-shaped in section but of the same width as the damper and connected by a transverse pivot 68 to the end of the damper 56. Near the other end is a pivot 69 connected to the vertical edges 26 and I8 for supporting the member to swing from a, full line position in which the upper edge is parallel with the damper to an upper open position of the damper as shown in broken outline in Fig. struction is to insure that the damper and the member 6'! will substantially fill a ventilator of predetermined length and still the damper may be swung upwardly to open to its full extent for the, passage of air'therethrough.

A pull cord or chain 11 is connected to the upper side of the damper near the end thereof and ex-' tends downwardly over the pivoting member 61 and may be pulled downwardly to raise the damper from its seat.

Instead of operating the damper with the chain 11, the lower end of a lever 10 connected to the vertical side 26 (or 18) may be formed with a rack 12 engaged by a pinion M which is operated in opposite directions by a motor 16. This lever 10 is connected by a bar 18 with another lever near the other end of the damper which is rocked back and forth with the operates to swing the damper upwardly similar to the action of the link 60. An end member 61 similar to that shown in Fig. 5 may also be similarly connected at the other end of the damper. With this damper lower the damper in a well known manner.

With this construction, a dual ventilator unit is formed which is strong and simple in construction provided with ample means for draining the free from water or other liquids which tend to deteriorate the metal. The

unit is connected for great end to end strength adapting it to be used as either in'lateral or longitudinal alignment.

also protect from 5. One object of this con-' lever 10 and mounting, the operation of the motor in opposite directions will raise and The diverters within the unit down drafts within the ven-' tilator and deflect any transverse air or gases illustration rather than as a:

2338756186 limitation or IIBStIiCfiOHf'Of' theinventionwas'varishort of: the .upper inclinedxedge of the common one changes in thexconstruction; combination and central bottom; memberyto allowxliquidtolpass arrangement of the-parts may be madewithout downwardly :to. the centercof thecommonmemdeparting from thespiritand scope of the-invenher, the innerlwall of adjacent Ventilators being tion. in common andldisposed centrally of the comww xclaim men bottom member, a: central angular deflector l A dual ventilator unit comprising a com- .with its apex located at the top of each ventimon base and parallel ventilators mounted therelator slightly above the upper ed es f he i ner unit having a common horizontal centra1 meml0 deflectorzbeinginclined downwardly and flaring vertical wallmextending upwardly tromsaid cenofctiletinnerlandouterbottom members,.means correspondingl bent :edge f the common member deflector in pairs intermediate the ends thereof,

the opening between the seat of the edge of the inclined war ly at their bottoms and concommon central member and the edge of the l 1 61 a their:,ou.terr.ends to the adjacent porouter deflector, outer side members for each ven- H0115 0f the Side Wallsv tilator terminating short of the lower edges of 4. In a dual ventilatorunit comprising adjathe bottoms of -the-upwardly inclined deflector cent'lndl'vldual n t rs, a horizontal common each ventilator located above the damper and divelftingiliquid iw i i p to adjacent flectonandtthe inclined outer walls of the ven- COmmOHmeTPbeT di at d tance tops in pairs intermediate the ends of the angumon member to allow liquld to flow downwardly lar deflector and extending outwardly from each to the central trough of the common member other toward the bottom and tendmg to deflect the upper edge of the vertical wall member havinward air and gas currents outwardly from the 40 i an upnght angular trough portion inclined Ventilator. inwardly substantially parallel to the inclina- 2. In a ventilator having spaced sides inclined tion of the corresponding Ough portion of the inwardly and spaced apart at the top, an angular common centre?! member.an Wall for each of the sides, the deflector having outwardly flarinclined member extending inwardly d pbeing substantially at the top of the spaced sides and with its bottom Wall inclined mber and a current of air passing over the ventilator from apex Spaced from the upper ges Of the inner id Bash side forming the inner edge f a ports below the deflector and movable from the seat, an outer side wall member for each ventior. the divert rs being arranged in p irs wall member for each ventilator having one por- In Ventilator having Opposite side walls entil t b t spaced therefrom t lower edge Wardly substantially parallel with the inclined of the inner wall member having opposite porportions of the d Walls and having upp d e-S tions also inclined outwardly but terminating turned downwardly to form opposite spaced damper seats, a damper movably mounted in the upper edges of the common central member to ventilator to engage and rise from the seats, an provide continuous drain spaces therebetween, angular ridge deflector with its apex between the the outer side of each ventilator opening having spaces and inclined portions of the top and exa deflector which extends angularly upwardly tending above the level of the tops of the sides, and inwardly to correspond with the edges of the sides of the angular deflector extending downthe common central member and to provide a verwardly and outwardly spaced from but overlying tical edge forming an outer seat for a damper, the damper seats, web means connectin the an outer side wall member for each ventilator said inclined members at the bottom and the terminating short of the lower edge of the said side walls t provide a fluid escaping space be deflector at its bottom member to provide a drain tween the said inclined members and the side opening and the upper edge of the outer side Walls, other web means connecting the angular Wall member inclined inwardly to correspond deflector and adjacent portions of the side walls, With the upper edge of the upp ough of the all of the last w b means extending oppositely vertical common wall member between the venin pairs intermediate the ends of the deflector, ti ators which is inclined outwardly, a deflector the members of each pair being spaced apart at having an apex extending ab e tops o e the top and inclined outwardly at the bottoms to inwardly inclined edges of the ut r W memform diverters tending to prevent air and gas bers and having flaring sides extending a d- Which passes over the deflector from passing 3 and Spaced above u Overlapping e n r downwardly therethrough and outer damper seats of each ventilator, and

6. A dual ventilator unit, comprising a common a damper having upp in t e nner and outer base and parallel ventilators mounted thereon damper Seats and movable from a P n n the and over an opening therethrough each t, seats to a position under the flaring sides of the having a horizontal common central member for deflector in h t t r.

adjacent ventilators inclined upwardly at both sides to provide a discharge trough and the up- References Cited in the file of this Patent per edges of the sides forming inner damper UNITED STATES PATENTS seats, a vertical common central'wall member for Number Name D adjacent ventilators extending upwardly over the 1 275 157 Brown A 25 1913 horizontal common central member and having 2122530 igg F 1933 an angular trough secured to the upp r edge 7 Whitak A 16 1938 thereof and inclined outwardly and an inverted 2134143 Pa er "HT--- 2 trough member at the bottom Of th Vertical 2265261 fg fi D 1 1938 common wall member which is positioned within 2404961 Ho h f 1941 the horizontal common cen ral member and thev it gfi Ngv :2 13:2

outer edges thereof terminating short of the 

